Below is the letter if the employee is transferred to a different location in your company due to a project assignment. Let me know if you need any other help.
XYZ E code Company Name
Subject: Transfer to ABC Office, Bangalore, India
Dear XYZ,
This is to inform you that you will be transferred to our Bangalore office effective from 2nd July 2012. This transfer is due to the ABC project assigned to you. At Bangalore, you will be reporting to Mr. (Manager Name). All other terms of employment remain the same.
Kindly submit an acknowledgment copy to the HR Team.
Thanks,
HR Team